如何在php中显示pdf

I'm trying to display a pdf file in php, I used:

<html>
<head>
<style type="text/css">
#myiframe {width:600px; height:100%;} 
</style>
</head>
<body>
<div id="scroller">
<iframe name="myiframe" id="myiframe" src="xml.pdf">
</div>
</body>
</html>

it works in html well, but when I want to used this code into a php file, it displays nothing and only try to download the pdf file. Can anybody help me?

There are quite a few options that can be used: (both tested).

Here are two ways.

header("Content-type: application/pdf");
header("Content-Disposition: inline; filename=filename.pdf");
@readfile('path\to\filename.pdf');

or: (note the escaped double-quotes). The same need to be use when assigning a name to it.

<?php

echo "<iframe src=\"file.pdf\" width=\"100%\" style=\"height:100%\"></iframe>";

?>

I.e.: name="myiframe" id="myiframe"

would need to be changed to:

name=\"myiframe\" id=\"myiframe\" inside PHP.

Be sure to have a look at: this answer on SO for more options on the subject.

Footnote: There are known issues when trying to view PDF files in Windows 8. Installing Adobe Acrobat Reader is a better method to view these types of documents if no browser plug-ins are installed.

Try this below code

<?php
$file = 'dummy.pdf';
$filename = 'dummy.pdf';
header('Content-type: application/pdf');
header('Content-Disposition: inline; filename="' . $filename . '"');
header('Content-Transfer-Encoding: binary');
header('Content-Length: ' . filesize($file));
header('Accept-Ranges: bytes');
@readfile($file);
?>

Demo

Download PDFObject library from https://pdfobject.com/ and check the below code: I hope it will work you.

<!DOCTYPE html>
<html>
<head>
    <title>Pdf Read</title>
    <style>
          .pdfobject-container { height: 500px;}
          .pdfobject { border: 1px solid #666; }
   </style>
   <script src="pdfobject.min.js"></script>
</head>
<body>
        <div id="example1"></div>
        <script>PDFObject.embed("pdfread.pdf", "#example1");</script>
</body>
</html>
if(isset($_GET['content'])){
  $content = $_GET['content'];
  $dir = $_GET['dir'];
  header("Content-type:".$content);
  @readfile($dir);
}

$directory = (file_exists("mydir/"))?"mydir/":die("file/directory doesn't exists");// checks directory if existing.
 //the line above is just a one-line if statement (syntax: (conditon)?code here if true : code if false; )
 if($handle = opendir($directory)){ //opens directory if existing.
   while ($file = readdir($handle)) { //assign each file with link <a> tag with GET params
     echo '<a target="_blank" href="?content=application/pdf&dir='.$directory.'">'.$file.'</a>';
}

}

if you click the link a new window will appear with the pdf file

Simple way to display pdf files from database and we can download it.
$resume is pdf file name which comes from database.
../resume/filename is path of folder where your file is stored.

<a href="../resumes/<?php echo $resume; ?>"/><?php echo $resume; ?></a>